Oxygastra curtisii (Orange-spotted Emerald)

This delightfully marked creature, which we’ve encountered just once at La Brenne in France, used to breed in Britain, apparently. It has been regarded as extinct in the UK since 1963, though. [Smallshire/Swash].

This is the only member of the genus worldwide. Its venation and appendages are, perhaps unsurprisingly, unique in Europe.